When they build a swing arm the design dictates which parts flex and by how much to give the best grip... Rather than making 100 different swing arms with different flex and stiffness to test, they have that rig

In all the holes you can see they're able to mount bars / braces to change how it flexes to work out what gives the best grip, then design the new swing arm using the data from that

When they build a swing arm the design dictates which parts flex and by how much to give the best grip... Rather than making 100 different swing arms with different flex and stiffness to test, they have that rig

In all the holes you can see they're able to mount bars / braces to change how it flexes to work out what gives the best grip, then design the new swing arm using the data from that